Highly Accurate Positioning: VEVOR pipe locators come with a 100ft/30m long signal line and adopts electromagnetic induction principle. Its signal has strong penetration and precise positioning ability, allowing it to pass through the detection distance of non-metal pipes within 0-40 cm, and the metal pipes 0-15 cm. Make the invisible pipelines blockages visible ! Strong IP67 Waterproof Ability: The pipe blockage detector works in tough conditions and can detect blockages in both wet and dry pipelines. Comes with 8 spare waterproof probes that are easy to replace on your own, solving the problem of clogged pipes faced by construction engineers and home users. Free Sensitivity Adjustment: Adjust the sensitivity according to the actual measurement condition. Increase sensitivity to determine a larger range when the blockage point is not found, and then decrease sensitivity to pinpoint the exact blockage area. Operate Longer and More Conveniently: Two charging options - USB and direct lithium battery charging. A full charge powers the transmitter for approximately 10 hours and the receiver for 5 hours. Features constant voltage output for safe and efficient operation. Green low battery indicator prompts timely recharging. Wide Applicability: Comes with a user manual, charging cable, earphone cable, 8 waterproof probes, and adhesive. VEVOR pipeline blocking clogging finder, an intelligent blockage measurement tool, is easy to locate blockage points while paying attention to every detail. Quality sewer wall scanner sensor is widely applicable for locating blockages in metal pipes, PVC pipes, water pipes, plastic pipes, and even wall nails. Product Compatibility: The extendable length is influenced by the number of bends and the size of the pipe diameter. To prevent cable bending and tangling, it is recommended to use it in pipes with a smooth inner wall and larger diameter. In general, it can pass through one bend in pipes with a diameter greater than 15 inches, and 2-3 bends in pipes with a diameter above 23 inches. Receiver signal length (depth): Non-metallic pipes 0-40 cm; metallic pipes 0-15 cm.